Improvement in the mode of fitting the hammer-heads of piano-fortes



'hammer-head I insert,in an opening or groove UNITED STATES PATENT OFFICE.,

JOHN MAOKAY, OF BOSTON, MASSACHUSETTS.

IMPROVEMENT IN THE MODE OF FITTING THE HAMMER-HEADS 0F PINO-FOR'TES.

Speeiticntion forming part of Letters Patent dated August 1J, 1828; Reissue No. S, dnteiTApl-Il 2 3, 1839.

tone than that produced by the common mode of making hammers.

I am aware that the keys of hammers have have invented an Improvement in the Mode been frequently loaded by the insertion of plugs or pieces of metal for the purpose of ac- PianoFortes; and Idohereby declarethat the I celerating their fall in playing; but the object and ei'ect of lny invention 1s altogether different, it being to e'ect the force and quality of the tone.

What I claim as my invention7 and desire prepared for that purpose, a piece of lead or to secure by Letters Patent, is-Y other metallic substance, after which I put on The insertion of a piece of metal or thc afthe usual covering of leather or other elastic fixing the same in any equivalent manner to substance. the upper end of the hammer-head, vsubstan- In the accompanying drawing, a a repretially in the manner and for the purpose above selt the wooden part of the hammer-head, set forth. p an b the piece ofv metal let into it immedif T I ately under the elastic covering c. The ef- I JOHA MACKAX Into the top of the wooden portion of the fect of so weighting or loading the hammer- XVitnesses: head is to cause it to produce by its blow upon THos. P. JONES, the strings a much stronger, fuller,andlouder LINToN THoRN. Q i 

